Ups. yes.
You can do it by hand, then
. gen index = _n
. reshape long Var, i(index)
. by index Var, sort: gen countdif = 1 if _n==1
. by index: replace countdif = sum(countdif)
. by index: replace countdif = coundif[_N]
. reshape long
Am Montag, den 07.12.2009, 16:02 +0100 schrieb Martin Weiss:
> <>
>
>
>
> *************
> egen, group()
> *************
>
> does not support -by-, though...
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected] [mailto:[email protected]] Im Auftrag von Ulrich Kohler
> Gesendet: Montag, 7. Dezember 2009 16:04
> An: [email protected]
> Betreff: Re: st: data management
>
> I would use egen-group in the long format for this:
>
> . gen index = _n
> . reshape long Var, i(index)
> . egen countdif = group(Var), by(index)
> . reshape long
>
> Many regards
> Uli
>
> Am Montag, den 07.12.2009, 15:56 +0100 schrieb [email protected]:
> > Dear all,
> > I have a quick data management question. I would like to count the number of different values over several variables within a row and save the result in a new variable.
> >
> > For example:
> > Var1 Var2 Var3 Var4 Var5 Var6 Var7 Varx
> > 1 2 3 9 20 1 1 ...
> >
> > In the example above, the new variable would holds the value 5, since Var1, Var6 and Var7 all hold the same value (put differently, 5 different values can be count over var1 - var7).
> >
> > I tried the following command: egen byte countdif = diff(var1 var2 var3 var4 var5 var6 var7 varx). However, the new variable is only a dummy (0/1).
> >
> > I bet there is a very simple solution – however I am too blind to see it…
> >
> > I appreciate any help and suggestions.
> > Thanks
> > Simon
> >
> >
> >
> > *
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> > * http://www.ats.ucla.edu/stat/stata/
>
>
>
> *
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